Default [Q] TWRP 2.7.0.0 Backup fails

TWRP 2.6.3.1 backed up and restored just fine on my Verizon Galaxy S3. I just upgraded via GooManager (v2.1.3) to TWRP 2.7.0.0 and now my backup fails every time (to my ext sd card). Is this a bug in the new version? Or something else?
Samsung Galaxy Note 3
Bean's Stock 4.4.2 NC4

Galaxy Note 10.1 2014
Hyperdrive KK RLS1

Nexus 10
Purity KK 4.4.4